Malicious PDF — malware analysis report

Static analysis result for SHA-256 2052990669545af5…

MALICIOUS

PDF

41.9 KB Created: 2020-08-10 20:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08ddcb82e46fa2cb8d690e4e7cc37ba2 SHA-1: 4c1f9247226e05605abf5c6d051548688c9227ba SHA-256: 2052990669545af5a416fa400b80b7b5acc80b21b833f9aad2c1b22f006c4ef2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=advanced+life+support+manual+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The presence of a large number of external PDF links further supports a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=advanced+life+support+manual+pdf
    • http://files.wedoliabilityinsurance.com/uploads/1/3/1/4/131438113/17234ed8f.pdf
    • http://jinovolev.carnivalcandlecompany.com/uploads/1/3/0/7/130775085/5256842.pdf
    • http://files.guttenbergfiredept.com/uploads/1/3/1/3/131381640/zepefo-lawoxip.pdf
    • http://files.plainseagle.com/uploads/1/3/1/3/131379325/raxuduwixu_gevajagojul.pdf
    • http://bijefu.stcatherineofalexandriachurch.com/uploads/1/3/1/8/131857315/17019699.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1865/files/dieta_proteica_para_aumentar_masa_muscular.pdf
    • https://cdn.shopify.com/s/files/1/0433/1310/2998/files/guzamegimubezofanobe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3382/0322/files/26787411326.pdf
    • https://cdn.shopify.com/s/files/1/0428/6133/0598/files/microeconomics_hubbard_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/9720/1576/files/princeton_review_sat_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/zuvatijupotagoxasix.pdf
    • https://cdn.shopify.com/s/files/1/0433/4528/1183/files/jigonotajamepazar.pdf
    • https://cdn.shopify.com/s/files/1/0433/6409/0006/files/61110152531.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/zimogokukupujazodunaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/1893/4677/files/bodobodu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1735/files/89278576820.pdf
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/fibopusimonak.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a49.bin
cb9d0a310df14a88988c658056076d5c9d92b84e5bfb3fe894fc2604a97b7867		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A49 5232 bytes
font_01_sfnt_off00006bff.bin
4fa9fe85f4282aa0bdc48c0c5b696b78ad841c7cb1c9d9f801a8c7725fc7811e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFF 9504 bytes
font_02_sfnt_off00008c77.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C77 4324 bytes

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